everyone talks about wide low pitch props and the only thing I've seen by using them is a series of deadsticks - don't you have to match pitch and prop to manufacturers specs?
i tried a 12.25 by 375 and it ran horrible, i would have a deadstick or slow rev up after 20 seconds at idle. switched to 12 by 8 and i can hold an idle for three mins with perfect throttle response. it does not climb as fast but nor does it die off a touch and go to hover. Too big and the throttle response is slow. I fly a twist 40 w/ OS 61 FX, sullivan tail gear graph tex carbon fiber main gear 1/8th" axle 2 " tires with 625 mgs servos in the tail and it balances perfect 4.6 cg w/o weight added. i am going to fly 12 by 6 next for a quicker rev. But i don't think i would even try a 13 by 4 wide again as it had a dead stick as well. I tried a 14 by 4 once and it was a dog. my engine is pro tuned and well broken in. opinions...